题目内容
Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.
Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades.
“We’ve been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO2 levels. And we’ve been able to record this increasing quantity of atmospheric CO2 into the ocean.”
Scientists expected that as atmospheric CO2 increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.
“As carbon dioxide dissolves (溶解) in the water, or seawater in this case, it forms a weak acid (酸), carbonic acid, ” Dore explains. “And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the pH down, and makes it more acidic.”
The seawater Dore and his colleagues have analyzed confirms what the theory predicts.
The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.
“It’s important to realize that the oceans are really becoming acidic. And it can have negative impacts on a whole variety of sea life from fish to coral. It’s potentially catastrophic.”
68. What can be the best title of the passage?
A. Sea Life Facing Danger B. Scientist Researching Seawater
C. Oceans Becoming More Acidic D. Climate Change Affecting Seawater
69. Which of the following shows the process of the impact of atmospheric CO2 on sea life?
a. Sea life is endangered.
b. CO2 goes into the surface water.
c. The ocean chemistry is affected.
d. CO2 decreases the pH and makes the seawater more acidic.
e. CO2 levels in the atmosphere go up.
A. a→b→c→d→e B. e→b→c→d→a
C. a→e→c→d→b D. e→d→c→b→a
70. Scientist Robert Dore came to the conclusion based on ________.
A. his research and analysis B. the expectation of other scientists
C. some former theory D. a major cause of climate change
71. What does the passage want to tell us most?
A. It takes time to make a scientific study.
B. Atmospheric CO2 is doing harm to sea life.
C. Robert Dore is a committed and serious scientist.
D. Measures should be taken to prevent the potential catastrophe.
68-71 ABAD
We all remember seeing hitchhikers, standing by the side of the road, thumb, sticking out, waiting for a lift. But it is getting rare nowadays. What killed hitchhiking? Safety is often mentioned as a reason. Movies about murderous hitchhikers and real-life crime have put many drivers off picking up hitchhikers. That no single women picked me up on my journey to Manchester no doubt reflects the safety fear: a large, strangely dressed man is seen as dangerous.
But the reason may be more complex: hitchhiking happens where people don’t have cars and transport services are poor. Plenty of people still hitchhike in Poland and Romania. Perhaps the rising level of car ownership in the UK means the few people lift hitchhiking are usually considered strange. Why can’t they afford cars? Why can’t they take the coach or the train?
Three-quarters of the UK population have access to a car; many of the remainder will be quite old. The potential hitchhiking population is therefore small. Yet my trip proves it’s still possible to hitchhike. The people who picks me up were very interesting-lawyer, retired surgeon, tank commander, carpenter, man who live in an isolated farmhouse and a couple living up in the mountains. My conclusion is that only really interesting people are mad enough to pick up fat blokes in red, spotted scarves. Most just wanted to do someone a good turn; a few said they were so surprised to see a hitchhiker that they couldn’t help stopping.
The future of hitchhiking most likely lies with car-sharing organized over the Internet, via sites such as hitchhikers. org. But for now, you can still stick your thumb out (actually, I didn’t do much of that, preferring just to hold up my destination sign) and people—wonderful, caring, sharing, unafraid people—will stop.
In the UK, with its cheap coaches and reasonable rail service, I don’t think I’ll make a habit of it. But having enjoyed it so much, I’m ready now to do a big trip across Europe and beyond. In the 1970s a female friend of my wife’s hitchhiked to India. How wonderful it would be to have another go, though Afghanistan might be a challenge. I wish I’d got that tank commander’s mobile number.
【小题1】The author tried to hitchhike but was rejected by single women drivers because .
| A．they were not heading towards Manchester |
| B．they thought most hitchhikers were dangerous |
| C．hitchhiking had been banned and they didn’t want to break the law |
| D．he was a strong man in strange clothes who seemed dangerous |
| A．Movies have discouraged people from hitchhiking |
| B．Car ownership levels are lower in Romania than in the UK. |
| C．25% of UK people don’t have access to cars. |
| D．Increased car ownership has reduced the need for hitchhiking. |
| A．murderous hitchhikers | B．friendly and talkative hitchhikers |
| C．typical hitchhikers | D．strange hitchhikers like the author |
| A．visit websites and find people to share cars with |
| B．stand by roads with their thumbs sticking out |
| C．stick out signs with their destinations written on |
| D．wait for some kind people to pick them up |
| A．frequently hitchhikes in Britain |
| B．plans to hitchhike across Europe |
| C．thinks public transport is safer for travel |
| D．is going to contact the tank commander |
English teenagers are to receive compulsory(必修的)cooking lessons in schools. The idea is to encourage healthy eating to fight the country’s increasing obesity(肥胖)rate. It’s feared that basic cooking and food preparation skills are being lost as parents turn to pre-pre-pared convenience foods.
Cooking was once regarded as an important part of education in England-even if it was mainly aimed at girls. In recent decades cooking has progressively become a minor activity in schools. In many cases the schools themselves have given up cooking meals in kitchens in the schools .But the rising level of obesity has led to a rethink about the food that children are given and the skills they should be taught.
“What I want is to teach young people how to do basic, simple recipes like a tomato sauce, a bolognaise, a simple curry, a stir-fry-which they can use now at home and then in their later life”, said Ed Balls, the minister responsible for schools.
The new lessons are due to start in September, but some schools without kitchens will be given longer to adapt. There is also likely to be a shortage of teachers with the right skills, since the trend has been to teach food technology rather than practical cooking. Also the compulsory lessons for hands on cooking will only be one hour a week for one term. But the well-known cookery writer, Pru Leith, believes it will be worth it .
“If we’d done this thirty years ago we might not have the crisis we’ve got now about obesity and lack of knowledge about food and so on. Every child should know how to cook, not just so that they’ll be healthy, but because it’s a life skill which is a real pleasure”.
The renewed interest in cooking is primarily a response to the level of obesity in Britain which is among the highest in Europe, and according to government figures half of all Britains will be obese in 25 years if current trends are not stopped.
【小题1】The passage mainly talks about .
| A．the compulsory cooking classes | B．the lost cooking skills |
| C．the healthy eating | D．the reason for obesity |
| A．To encourage teenagers to eat healthy food. |
| B．To reduce the country’s increasing obesity rate. |
| C．To prevent basic cooking and food preparation skills from being lost. |
| D．To stop parents from turning to pre-prepared convenience foods. |
| A．They will be able to do some basic, simple recipes like a tomato sauce. |
| B．They will be healthy and enjoy the pleasure of such a life skill as well. |
| C．They will be able to make food experiments with the knowledge and skills. |
| D．They will be able to control the level of obesity in the whole country. |
| A．difficult | B．necessary | C．funny | D．timely |
| A．cooking has always been an important part of school education in England |
| B．English teenagers will have their cooking lessons twice a week for one year |
| C．the obesity rate in Britain has been rapidly growing in recent decades |
| D．the students will pay a lot of money to the school for their cooking lessons |